package thread;

import java.util.concurrent.Semaphore;

public class Demo34 {
    public static int count = 0;

    public static void main(String[] args) throws InterruptedException {
        Semaphore semaphore = new Semaphore(1);//Semaphore容量为1的时候可以用作锁

        Thread t1 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                try {
                    semaphore.acquire();
                    count++;
                    semaphore.release();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });

        Thread t2 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                try {
                    semaphore.acquire();
                    count++;
                    semaphore.release();

                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(count);
    }
}
